diff options
Diffstat (limited to 'vendor/gioui.org/app/GioView.java')
| -rw-r--r-- | vendor/gioui.org/app/GioView.java | 480 |
1 files changed, 480 insertions, 0 deletions
diff --git a/vendor/gioui.org/app/GioView.java b/vendor/gioui.org/app/GioView.java new file mode 100644 index 0000000..14639b0 --- /dev/null +++ b/vendor/gioui.org/app/GioView.java @@ -0,0 +1,480 @@ +// SPDX-License-Identifier: Unlicense OR MIT + +package org.gioui; + +import java.lang.Class; +import java.lang.IllegalAccessException; +import java.lang.InstantiationException; +import java.lang.ExceptionInInitializerError; +import java.lang.SecurityException; +import android.app.Activity; +import android.app.Fragment; +import android.app.FragmentManager; +import android.app.FragmentTransaction; +import android.content.Context; +import android.graphics.Canvas; +import android.graphics.Color; +import android.graphics.Rect; +import android.os.Build; +import android.os.Bundle; +import android.text.Editable; +import android.util.AttributeSet; +import android.util.TypedValue; +import android.view.KeyCharacterMap; +import android.view.KeyEvent; +import android.view.MotionEvent; +import android.view.PointerIcon; +import android.view.View; +import android.view.ViewConfiguration; +import android.view.WindowInsets; +import android.view.Surface; +import android.view.SurfaceView; +import android.view.SurfaceHolder; +import android.view.Window; +import android.view.WindowInsetsController; +import android.view.WindowManager; +import android.view.inputmethod.BaseInputConnection; +import android.view.inputmethod.InputConnection; +import android.view.inputmethod.InputMethodManager; +import android.view.inputmethod.EditorInfo; +import android.text.InputType; +import android.view.accessibility.AccessibilityNodeProvider; +import android.view.accessibility.AccessibilityNodeInfo; +import android.view.accessibility.AccessibilityEvent; +import android.view.accessibility.AccessibilityManager; + +import java.io.UnsupportedEncodingException; + +public final class GioView extends SurfaceView { + private static boolean jniLoaded; + + private final SurfaceHolder.Callback surfCallbacks; + private final View.OnFocusChangeListener focusCallback; + private final InputMethodManager imm; + private final float scrollXScale; + private final float scrollYScale; + private int keyboardHint; + private AccessibilityManager accessManager; + + private long nhandle; + + public GioView(Context context) { + this(context, null); + } + + public GioView(Context context, AttributeSet attrs) { + super(context, attrs); + if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) { + setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_LAYOUT_STABLE); + } + setLayoutParams(new WindowManager.LayoutParams(WindowManager.LayoutParams.MATCH_PARENT, WindowManager.LayoutParams.MATCH_PARENT)); + + // Late initialization of the Go runtime to wait for a valid context. + Gio.init(context.getApplicationContext()); + + // Set background color to transparent to avoid a flickering + // issue on ChromeOS. + setBackgroundColor(Color.argb(0, 0, 0, 0)); + + ViewConfiguration conf = ViewConfiguration.get(context); + if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) { + scrollXScale = conf.getScaledHorizontalScrollFactor(); + scrollYScale = conf.getScaledVerticalScrollFactor(); + + // The platform focus highlight is not aware of Gio's widgets. + setDefaultFocusHighlightEnabled(false); + } else { + float listItemHeight = 48; // dp + float px = TypedValue.applyDimension( + TypedValue.COMPLEX_UNIT_DIP, + listItemHeight, + getResources().getDisplayMetrics() + ); + scrollXScale = px; + scrollYScale = px; + } + + accessManager = (AccessibilityManager)context.getSystemService(Context.ACCESSIBILITY_SERVICE); + nhandle = onCreateView(this); + imm = (InputMethodManager)context.getSystemService(Context.INPUT_METHOD_SERVICE); + setFocusable(true); + setFocusableInTouchMode(true); + focusCallback = new View.OnFocusChangeListener() { + @Override public void onFocusChange(View v, boolean focus) { + GioView.this.onFocusChange(nhandle, focus); + } + }; + setOnFocusChangeListener(focusCallback); + surfCallbacks = new SurfaceHolder.Callback() { + @Override public void surfaceCreated(SurfaceHolder holder) { + // Ignore; surfaceChanged is guaranteed to be called immediately after this. + } + @Override public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) { + onSurfaceChanged(nhandle, getHolder().getSurface()); + } + @Override public void surfaceDestroyed(SurfaceHolder holder) { + onSurfaceDestroyed(nhandle); + } + }; + getHolder().addCallback(surfCallbacks); + } + + @Override public boolean onKeyDown(int keyCode, KeyEvent event) { + if (nhandle != 0) { + onKeyEvent(nhandle, keyCode, event.getUnicodeChar(), event.getEventTime()); + } + return false; + } + + @Override public boolean onGenericMotionEvent(MotionEvent event) { + dispatchMotionEvent(event); + return true; + } + + @Override public boolean onTouchEvent(MotionEvent event) { + // Ask for unbuffered events. Flutter and Chrome do it + // so assume it's good for us as well. + if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) { + requestUnbufferedDispatch(event); + } + + dispatchMotionEvent(event); + return true; + } + + private void setCursor(int id) { + if (Build.VERSION.SDK_INT < Build.VERSION_CODES.N) { + return; + } + PointerIcon pointerIcon = PointerIcon.getSystemIcon(getContext(), id); + setPointerIcon(pointerIcon); + } + + private void setOrientation(int id, int fallback) { + if (Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN_MR2) { + id = fallback; + } + ((Activity) this.getContext()).setRequestedOrientation(id); + } + + private void setFullscreen(boolean enabled) { + int flags = this.getSystemUiVisibility(); + if (enabled) { + flags |= SYSTEM_UI_FLAG_IMMERSIVE_STICKY; + flags |= SYSTEM_UI_FLAG_HIDE_NAVIGATION; + flags |= SYSTEM_UI_FLAG_FULLSCREEN; + flags |= SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN; + } else { + flags &= ~SYSTEM_UI_FLAG_IMMERSIVE_STICKY; + flags &= ~SYSTEM_UI_FLAG_HIDE_NAVIGATION; + flags &= ~SYSTEM_UI_FLAG_FULLSCREEN; + flags &= ~SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN; + } + this.setSystemUiVisibility(flags); + } + + private enum Bar { + NAVIGATION, + STATUS, + } + + private void setBarColor(Bar t, int color, int luminance) { + if (Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP) { + return; + } + + Window window = ((Activity) this.getContext()).getWindow(); + + int insetsMask; + int viewMask; + + switch (t) { + case STATUS: + insetsMask = WindowInsetsController.APPEARANCE_LIGHT_STATUS_BARS; + viewMask = View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR; + window.setStatusBarColor(color); + break; + case NAVIGATION: + insetsMask = WindowInsetsController.APPEARANCE_LIGHT_NAVIGATION_BARS; + viewMask = View.SYSTEM_UI_FLAG_LIGHT_NAVIGATION_BAR; + window.setNavigationBarColor(color); + break; + default: + throw new RuntimeException("invalid bar type"); + } + + if (Build.VERSION.SDK_INT < Build.VERSION_CODES.M) { + return; + } + + if (Build.VERSION.SDK_INT < Build.VERSION_CODES.R) { + int flags = this.getSystemUiVisibility(); + if (luminance > 128) { + flags |= viewMask; + } else { + flags &= ~viewMask; + } + this.setSystemUiVisibility(flags); + return; + } + + WindowInsetsController insetsController = window.getInsetsController(); + if (insetsController == null) { + return; + } + if (luminance > 128) { + insetsController.setSystemBarsAppearance(insetsMask, insetsMask); + } else { + insetsController.setSystemBarsAppearance(0, insetsMask); + } + } + + private void setStatusColor(int color, int luminance) { + this.setBarColor(Bar.STATUS, color, luminance); + } + + private void setNavigationColor(int color, int luminance) { + this.setBarColor(Bar.NAVIGATION, color, luminance); + } + + @Override protected boolean dispatchHoverEvent(MotionEvent event) { + if (!accessManager.isTouchExplorationEnabled()) { + return super.dispatchHoverEvent(event); + } + switch (event.getAction()) { + case MotionEvent.ACTION_HOVER_ENTER: + // Fall through. + case MotionEvent.ACTION_HOVER_MOVE: + onTouchExploration(nhandle, event.getX(), event.getY()); + break; + case MotionEvent.ACTION_HOVER_EXIT: + onExitTouchExploration(nhandle); + break; + } + return true; + } + + void sendA11yEvent(int eventType, int viewId) { + if (!accessManager.isEnabled()) { + return; + } + AccessibilityEvent event = obtainA11yEvent(eventType, viewId); + getParent().requestSendAccessibilityEvent(this, event); + } + + AccessibilityEvent obtainA11yEvent(int eventType, int viewId) { + AccessibilityEvent event = AccessibilityEvent.obtain(eventType); + event.setPackageName(getContext().getPackageName()); + event.setSource(this, viewId); + return event; + } + + boolean isA11yActive() { + return accessManager.isEnabled(); + } + + void sendA11yChange(int viewId) { + if (!accessManager.isEnabled()) { + return; + } + AccessibilityEvent event = obtainA11yEvent(AccessibilityEvent.TYPE_WINDOW_CONTENT_CHANGED, viewId); + if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) { + event.setContentChangeTypes(AccessibilityEvent.CONTENT_CHANGE_TYPE_SUBTREE); + } + getParent().requestSendAccessibilityEvent(this, event); + } + + private void dispatchMotionEvent(MotionEvent event) { + if (nhandle == 0) { + return; + } + for (int j = 0; j < event.getHistorySize(); j++) { + long time = event.getHistoricalEventTime(j); + for (int i = 0; i < event.getPointerCount(); i++) { + onTouchEvent( + nhandle, + event.ACTION_MOVE, + event.getPointerId(i), + event.getToolType(i), + event.getHistoricalX(i, j), + event.getHistoricalY(i, j), + scrollXScale*event.getHistoricalAxisValue(MotionEvent.AXIS_HSCROLL, i, j), + scrollYScale*event.getHistoricalAxisValue(MotionEvent.AXIS_VSCROLL, i, j), + event.getButtonState(), + time); + } + } + int act = event.getActionMasked(); + int idx = event.getActionIndex(); + for (int i = 0; i < event.getPointerCount(); i++) { + int pact = event.ACTION_MOVE; + if (i == idx) { + pact = act; + } + onTouchEvent( + nhandle, + pact, + event.getPointerId(i), + event.getToolType(i), + event.getX(i), event.getY(i), + scrollXScale*event.getAxisValue(MotionEvent.AXIS_HSCROLL, i), + scrollYScale*event.getAxisValue(MotionEvent.AXIS_VSCROLL, i), + event.getButtonState(), + event.getEventTime()); + } + } + + @Override public InputConnection onCreateInputConnection(EditorInfo editor) { + editor.inputType = this.keyboardHint; + editor.imeOptions = EditorInfo.IME_FLAG_NO_FULLSCREEN | EditorInfo.IME_FLAG_NO_EXTRACT_UI; + return new InputConnection(this); + } + + void setInputHint(int hint) { + if (hint == this.keyboardHint) { + return; + } + this.keyboardHint = hint; + imm.restartInput(this); + } + + void showTextInput() { + GioView.this.requestFocus(); + imm.showSoftInput(GioView.this, 0); + } + + void hideTextInput() { + imm.hideSoftInputFromWindow(getWindowToken(), 0); + } + + @Override protected boolean fitSystemWindows(Rect insets) { + if (nhandle != 0) { + onWindowInsets(nhandle, insets.top, insets.right, insets.bottom, insets.left); + } + return true; + } + + @Override protected void onDraw(Canvas canvas) { + if (nhandle != 0) { + onFrameCallback(nhandle); + } + } + + int getDensity() { + return getResources().getDisplayMetrics().densityDpi; + } + + float getFontScale() { + return getResources().getConfiguration().fontScale; + } + + public void start() { + if (nhandle != 0) { + onStartView(nhandle); + } + } + + public void stop() { + if (nhandle != 0) { + onStopView(nhandle); + } + } + + public void destroy() { + if (nhandle != 0) { + onDestroyView(nhandle); + } + } + + protected void unregister() { + setOnFocusChangeListener(null); + getHolder().removeCallback(surfCallbacks); + nhandle = 0; + } + + public void configurationChanged() { + if (nhandle != 0) { + onConfigurationChanged(nhandle); + } + } + + public boolean backPressed() { + if (nhandle == 0) { + return false; + } + return onBack(nhandle); + } + + static private native long onCreateView(GioView view); + static private native void onDestroyView(long handle); + static private native void onStartView(long handle); + static private native void onStopView(long handle); + static private native void onSurfaceDestroyed(long handle); + static private native void onSurfaceChanged(long handle, Surface surface); + static private native void onConfigurationChanged(long handle); + static private native void onWindowInsets(long handle, int top, int right, int bottom, int left); + static public native void onLowMemory(); + static private native void onTouchEvent(long handle, int action, int pointerID, int tool, float x, float y, float scrollX, float scrollY, int buttons, long time); + static private native void onKeyEvent(long handle, int code, int character, long time); + static private native void onFrameCallback(long handle); + static private native boolean onBack(long handle); + static private native void onFocusChange(long handle, boolean focus); + static private native AccessibilityNodeInfo initializeAccessibilityNodeInfo(long handle, int viewId, int screenX, int screenY, AccessibilityNodeInfo info); + static private native void onTouchExploration(long handle, float x, float y); + static private native void onExitTouchExploration(long handle); + static private native void onA11yFocus(long handle, int viewId); + static private native void onClearA11yFocus(long handle, int viewId); + + private static class InputConnection extends BaseInputConnection { + private final Editable editable; + + InputConnection(View view) { + // Passing false enables "dummy mode", where the BaseInputConnection + // attempts to convert IME operations to key events. + super(view, false); + editable = Editable.Factory.getInstance().newEditable(""); + } + + @Override public Editable getEditable() { + return editable; + } + } + + @Override public AccessibilityNodeProvider getAccessibilityNodeProvider() { + return new AccessibilityNodeProvider() { + private final int[] screenOff = new int[2]; + + @Override public AccessibilityNodeInfo createAccessibilityNodeInfo(int viewId) { + AccessibilityNodeInfo info = null; + if (viewId == View.NO_ID) { + info = AccessibilityNodeInfo.obtain(GioView.this); + GioView.this.onInitializeAccessibilityNodeInfo(info); + } else { + info = AccessibilityNodeInfo.obtain(GioView.this, viewId); + info.setPackageName(getContext().getPackageName()); + info.setVisibleToUser(true); + } + GioView.this.getLocationOnScreen(screenOff); + info = GioView.this.initializeAccessibilityNodeInfo(nhandle, viewId, screenOff[0], screenOff[1], info); + return info; + } + + @Override public boolean performAction(int viewId, int action, Bundle arguments) { + if (viewId == View.NO_ID) { + return GioView.this.performAccessibilityAction(action, arguments); + } + switch (action) { + case AccessibilityNodeInfo.ACTION_ACCESSIBILITY_FOCUS: + GioView.this.onA11yFocus(nhandle, viewId); + GioView.this.sendA11yEvent(AccessibilityEvent.TYPE_VIEW_ACCESSIBILITY_FOCUSED, viewId); + return true; + case AccessibilityNodeInfo.ACTION_CLEAR_ACCESSIBILITY_FOCUS: + GioView.this.onClearA11yFocus(nhandle, viewId); + GioView.this.sendA11yEvent(AccessibilityEvent.TYPE_VIEW_ACCESSIBILITY_FOCUS_CLEARED, viewId); + return true; + } + return false; + } + }; + } +} |